I find this annoying and possibly less secure. In addition to the inconvenience of now having to use two messaging apps, how will it work if you exchange number

I find this annoying and possibly less secure. In addition to the inconvenience of now having to use two messaging apps, how will it work if you exchange numbers with someone, and you both use Signal but neither explicitly mentions it. That is almost always the case in my experience. By default I send a regular SMS, and it's a happy accident when it turns into a Signal message instead. Will this change result in two signal users exchanging plain SMS instead because neither mentioned they use Signal? That seems less secure than the current configuration. Of course, I am in the U.S. and there's no difference in cost to me between an sms and data message.